I'm putting together a new computer and trying to install Ubuntu Server 12.10 from USB (no optical drive). I'm using the AMD 64 bit installer (MD5 checksum reported fine) and Pendrive to put it on my USB drive.

When I start the computer with the USB drive connected, I get to an initial language select screen and then to the boot screen (the one with the option to install, do a memory test, etc). When I select "Install Ubuntu Server" I'm taken to another language selection screen where I'm unable to do anything but hard shutdown the computer (no keyboard or mouse input accepted). How can I fix this freeze?

Additional info:

USB appears to look like a UEFI drive in BIOS

While a SSD is first in boot order, it's a blank drive (as are the HDDs)

Using wireless USB keyboard the whole time. Keyboard works with other devices